Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0929d7bde0e2f8f…

MALICIOUS

PDF

70.0 KB Created: 2021-09-15 20:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 266d52af859874c2504cfb8780a79a0c SHA-1: 9037af56dc92c9adeee88a09f2851709909a3bf0 SHA-256: d0929d7bde0e2f8ffe7ee8770d1fc0e1785f874dc92c79e78010d112830b5530
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing an image-only presentation with clickable links to external URLs. The presence of embedded JavaScript and numerous links to potentially compromised or disposable hosting sites strongly suggests an attempt to redirect users to malicious content or download further payloads. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=advantages+and+disadvantages+of+cloning+pdf PDF link annotation
    • http://sinching.com/uploadpic/files/202109021802525204.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/goxokufubojatuzasipixe.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/25960074743.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/jekozulunafa.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59240164872.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e164261fe98103a0beb71eec3c9fc3e2/fexivekevoluvited.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc879e7db0---59489171908.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbc38c2518---revokukupewetosusuxu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fccc6c05c---5498323242.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/95700040894.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/18030968516.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/vulerimoverunavo.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/44585119818.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/64948249097.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/japavefabekulefenagolerop.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/pujofapenulixinesalaneb.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/siwezipexitulixepijoze.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/66b69178af78935d2c899e432cf1650a/dozuvavol.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/kubadav.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/ditefineginabutikobajegu.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/99595690958.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/46680574297.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/papegigefivigifatesigafu.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/fewixidoxogikivifepexu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AF 10740 bytes
SHA-256: 0bd86382bc47fd8a3789c65360043dbc5578d5ce3c33cdf82639cff80379eaa3
font_01_sfnt_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 14100 bytes
SHA-256: 542d553dfd54022e23d9cfec1e495c591178a433ca31d454dc00e048531c4e96
font_02_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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